#include <iostream>//输入输出流头文件







int main()
{   
    //std::endl:输出结束打个回车
    printf("%s\n","helloworld");
    int a = 10;
    double b;
    // double b = 3.14;
    // std::cout<<"helloworld"<<" "<<a<<" "<<b<<std::endl;

    // scanf("%d",&a);
    std::cin>>a>>b;
    std::cout<<a<<" "<<b<<" "<<std::endl;
    return 0;
}